| Message ID | a910e5bd3f3398b4bd430b25a856500735b993c3.camel@linux.ibm.com |
|---|---|
| Headers | show |
| Series | Enable VAS and NX-GZIP support on powerVM | expand |
Excerpts from Haren Myneni's message of April 18, 2021 7:04 am: > > Empty email? Thanks, Nick
On Mon, 2021-05-10 at 15:37 +1000, Nicholas Piggin wrote: > Excerpts from Haren Myneni's message of April 18, 2021 7:04 am: > > > > Empty email? > > Thanks, > Nick Sorry, My mistake. Here is the patch and will add in V4 series. [V3 PATCH 05/16] powerpc/vas: Define and use common vas_window struct Same vas_window struct is used on powerNV and pseries. So this patch changes in struct vas_window to support both platforms and also the corresponding modifications in powerNV vas code. On powerNV, vas_window is used for both TX and RX windows, whereas only for TX windows on powerVM. So some elements are specific to these platforms. Signed-off-by: Haren Myneni <haren@linux.ibm.com> --- arch/powerpc/include/asm/vas.h | 48 ++++++++ arch/powerpc/platforms/powernv/vas-debug.c | 12 +- arch/powerpc/platforms/powernv/vas-fault.c | 4 +- arch/powerpc/platforms/powernv/vas-trace.h | 6 +- arch/powerpc/platforms/powernv/vas-window.c | 129 +++++++++++--------- arch/powerpc/platforms/powernv/vas.h | 38 +----- 6 files changed, 135 insertions(+), 102 deletions(-) diff --git a/arch/powerpc/include/asm/vas.h b/arch/powerpc/include/asm/vas.h index 66bf8fb1a1be..f928bf4c7e98 100644 --- a/arch/powerpc/include/asm/vas.h +++ b/arch/powerpc/include/asm/vas.h @@ -69,6 +69,54 @@ struct vas_win_task { struct mm_struct *mm; /* Linux process mm_struct */ }; +/* + * In-kernel state a VAS window. One per window. + * powerVM: Used only for Tx windows. + * powerNV: Used for both Tx and Rx windows. + */ +struct vas_window { + u32 winid; + u32 wcreds_max; /* Window credits */ + enum vas_cop_type cop; + struct vas_win_task task; + char *dbgname; + struct dentry *dbgdir; + union { + /* powerNV specific data */ + struct { + void *vinst; /* points to VAS instance */ + bool tx_win; /* True if send window */ + bool nx_win; /* True if NX window */ + bool user_win; /* True if user space window */ + void *hvwc_map; /* HV window context */ + void *uwc_map; /* OS/User window context */ + + /* Fields applicable only to send windows */ + void *paste_kaddr; + char *paste_addr_name; + struct vas_window *rxwin; + + atomic_t num_txwins; /* Only for receive windows */ + } pnv; + struct { + u64 win_addr; /* Physical paste address */ + u8 win_type; /* QoS or Default window */ + u8 status; + u32 complete_irq; /* Completion interrupt */ + u32 fault_irq; /* Fault interrupt */ + u64 domain[6]; /* Associativity domain Ids */ + /* this window is allocated */ + u64 util; + + /* List of windows opened which is used for LPM */ + struct list_head win_list; + u64 flags; + char *name; + int fault_virq; + } lpar; + }; +}; + static inline void vas_drop_reference_task(struct vas_win_task *task) { /* Drop references to pid and mm */ diff --git a/arch/powerpc/platforms/powernv/vas-debug.c b/arch/powerpc/platforms/powernv/vas-debug.c index 41fa90d2f4ab..80f735449ab8 100644 --- a/arch/powerpc/platforms/powernv/vas-debug.c +++ b/arch/powerpc/platforms/powernv/vas-debug.c @@ -9,6 +9,7 @@ #include <linux/slab.h> #include <linux/debugfs.h> #include <linux/seq_file.h> +#include <asm/vas.h> #include "vas.h" static struct dentry *vas_debugfs; @@ -33,11 +34,11 @@ static int info_show(struct seq_file *s, void *private) mutex_lock(&vas_mutex); /* ensure window is not unmapped */ - if (!window->hvwc_map) + if (!window->pnv.hvwc_map) goto unlock; seq_printf(s, "Type: %s, %s\n", cop_to_str(window->cop), - window->tx_win ? "Send" : "Receive"); + window->pnv.tx_win ? "Send" : "Receive"); seq_printf(s, "Pid : %d\n", vas_window_pid(window)); unlock: @@ -60,7 +61,7 @@ static int hvwc_show(struct seq_file *s, void *private) mutex_lock(&vas_mutex); /* ensure window is not unmapped */ - if (!window->hvwc_map) + if (!window->pnv.hvwc_map) goto unlock; print_reg(s, window, VREG(LPID)); @@ -115,9 +116,10 @@ void vas_window_free_dbgdir(struct vas_window *window) void vas_window_init_dbgdir(struct vas_window *window) { + struct vas_instance *vinst = window->pnv.vinst; struct dentry *d; - if (!window->vinst->dbgdir) + if (!vinst->dbgdir) return; window->dbgname = kzalloc(16, GFP_KERNEL); @@ -126,7 +128,7 @@ void vas_window_init_dbgdir(struct vas_window *window) snprintf(window->dbgname, 16, "w%d", window->winid); - d = debugfs_create_dir(window->dbgname, window->vinst->dbgdir); + d = debugfs_create_dir(window->dbgname, vinst->dbgdir); window->dbgdir = d; debugfs_create_file("info", 0444, d, window, &info_fops); diff --git a/arch/powerpc/platforms/powernv/vas-fault.c b/arch/powerpc/platforms/powernv/vas-fault.c index 2e898eac1bb2..82acede2d892 100644 --- a/arch/powerpc/platforms/powernv/vas-fault.c +++ b/arch/powerpc/platforms/powernv/vas-fault.c @@ -152,10 +152,10 @@ irqreturn_t vas_fault_thread_fn(int irq, void *data) /* * NX sees faults only with user space windows. */ - if (window->user_win) + if (window->pnv.user_win) vas_update_csb(crb, &window->task); else - WARN_ON_ONCE(!window->user_win); + WARN_ON_ONCE(!window->pnv.user_win); /* * Return credit for send window after processing diff --git a/arch/powerpc/platforms/powernv/vas-trace.h b/arch/powerpc/platforms/powernv/vas-trace.h index a449b9f0c12e..843aae37c07a 100644 --- a/arch/powerpc/platforms/powernv/vas-trace.h +++ b/arch/powerpc/platforms/powernv/vas-trace.h @@ -95,9 +95,11 @@ TRACE_EVENT( vas_paste_crb, TP_fast_assign( __entry->pid = tsk->pid; - __entry->vasid = win->vinst->vas_id; + __entry->vasid = + ((struct vas_instance *)win->pnv.vinst)->vas_id; __entry->winid = win->winid; - __entry->paste_kaddr = (unsigned long)win->paste_kaddr + __entry->paste_kaddr = + (unsigned long)win->pnv.paste_kaddr; ), TP_printk("pid=%d, vasid=%d, winid=%d, paste_kaddr=0x%016lx\n", diff --git a/arch/powerpc/platforms/powernv/vas-window.c b/arch/powerpc/platforms/powernv/vas-window.c index 58e3d16c316f..254be61c73ab 100644 --- a/arch/powerpc/platforms/powernv/vas-window.c +++ b/arch/powerpc/platforms/powernv/vas-window.c @@ -32,9 +32,10 @@ void vas_win_paste_addr(struct vas_window *window, u64 *addr, int *len) { int winid; u64 base, shift; + struct vas_instance *vinst = window->pnv.vinst; - base = window->vinst->paste_base_addr; - shift = window->vinst->paste_win_id_shift; + base = vinst->paste_base_addr; + shift = vinst->paste_win_id_shift; winid = window->winid; *addr = base + (winid << shift); @@ -47,9 +48,10 @@ void vas_win_paste_addr(struct vas_window *window, u64 *addr, int *len) static inline void get_hvwc_mmio_bar(struct vas_window *window, u64 *start, int *len) { + struct vas_instance *vinst = window->pnv.vinst; u64 pbaddr; - pbaddr = window->vinst->hvwc_bar_start; + pbaddr = vinst->hvwc_bar_start; *start = pbaddr + window->winid * VAS_HVWC_SIZE; *len = VAS_HVWC_SIZE; } @@ -57,9 +59,10 @@ static inline void get_hvwc_mmio_bar(struct vas_window *window, static inline void get_uwc_mmio_bar(struct vas_window *window, u64 *start, int *len) { + struct vas_instance *vinst = window->pnv.vinst; u64 pbaddr; - pbaddr = window->vinst->uwc_bar_start; + pbaddr = vinst->uwc_bar_start; *start = pbaddr + window->winid * VAS_UWC_SIZE; *len = VAS_UWC_SIZE; } @@ -75,13 +78,14 @@ static void *map_paste_region(struct vas_window *txwin) void *map; char *name; u64 start; + struct vas_instance *vinst = txwin->pnv.vinst; - name = kasprintf(GFP_KERNEL, "window-v%d-w%d", txwin->vinst->vas_id, + name = kasprintf(GFP_KERNEL, "window-v%d-w%d", vinst->vas_id, txwin->winid); if (!name) goto free_name; - txwin->paste_addr_name = name; + txwin->pnv.paste_addr_name = name; vas_win_paste_addr(txwin, &start, &len); if (!request_mem_region(start, len, name)) { @@ -139,12 +143,12 @@ static void unmap_paste_region(struct vas_window *window) int len; u64 busaddr_start; - if (window->paste_kaddr) { + if (window->pnv.paste_kaddr) { vas_win_paste_addr(window, &busaddr_start, &len); - unmap_region(window->paste_kaddr, busaddr_start, len); - window->paste_kaddr = NULL; - kfree(window->paste_addr_name); - window->paste_addr_name = NULL; + unmap_region(window->pnv.paste_kaddr, busaddr_start, len); + window->pnv.paste_kaddr = NULL; + kfree(window->pnv.paste_addr_name); + window->pnv.paste_addr_name = NULL; } } @@ -164,11 +168,11 @@ static void unmap_winctx_mmio_bars(struct vas_window *window) mutex_lock(&vas_mutex); - hvwc_map = window->hvwc_map; - window->hvwc_map = NULL; + hvwc_map = window->pnv.hvwc_map; + window->pnv.hvwc_map = NULL; - uwc_map = window->uwc_map; - window->uwc_map = NULL; + uwc_map = window->pnv.uwc_map; + window->pnv.uwc_map = NULL; mutex_unlock(&vas_mutex); @@ -194,12 +198,12 @@ static int map_winctx_mmio_bars(struct vas_window *window) u64 start; get_hvwc_mmio_bar(window, &start, &len); - window->hvwc_map = map_mmio_region("HVWCM_Window", start, len); + window->pnv.hvwc_map = map_mmio_region("HVWCM_Window", start, len); get_uwc_mmio_bar(window, &start, &len); - window->uwc_map = map_mmio_region("UWCM_Window", start, len); + window->pnv.uwc_map = map_mmio_region("UWCM_Window", start, len); - if (!window->hvwc_map || !window->uwc_map) { + if (!window->pnv.hvwc_map || !window->pnv.uwc_map) { unmap_winctx_mmio_bars(window); return -1; } @@ -524,7 +528,7 @@ static int vas_assign_window_id(struct ida *ida) static void vas_window_free(struct vas_window *window) { int winid = window->winid; - struct vas_instance *vinst = window->vinst; + struct vas_instance *vinst = window->pnv.vinst; unmap_winctx_mmio_bars(window); @@ -548,7 +552,7 @@ static struct vas_window *vas_window_alloc(struct vas_instance *vinst) if (!window) goto out_free; - window->vinst = vinst; + window->pnv.vinst = vinst; window->winid = winid; if (map_winctx_mmio_bars(window)) @@ -567,9 +571,9 @@ static struct vas_window *vas_window_alloc(struct vas_instance *vinst) static void put_rx_win(struct vas_window *rxwin) { /* Better not be a send window! */ - WARN_ON_ONCE(rxwin->tx_win); + WARN_ON_ONCE(rxwin->pnv.tx_win); - atomic_dec(&rxwin->num_txwins); + atomic_dec(&rxwin->pnv.num_txwins); } /* @@ -592,7 +596,7 @@ static struct vas_window *get_user_rxwin(struct vas_instance *vinst, u32 pswid) rxwin = vinst->windows[winid]; - if (!rxwin || rxwin->tx_win || rxwin->cop != VAS_COP_TYPE_FTW) + if (!rxwin || rxwin->pnv.tx_win || rxwin->cop != VAS_COP_TYPE_FTW) return ERR_PTR(-EINVAL); return rxwin; @@ -617,7 +621,7 @@ static struct vas_window *get_vinst_rxwin(struct vas_instance *vinst, rxwin = vinst->rxwin[cop] ?: ERR_PTR(-EINVAL); if (!IS_ERR(rxwin)) - atomic_inc(&rxwin->num_txwins); + atomic_inc(&rxwin->pnv.num_txwins); mutex_unlock(&vinst->mutex); @@ -650,7 +654,7 @@ static void set_vinst_win(struct vas_instance *vinst, * There should only be one receive window for a coprocessor type * unless its a user (FTW) window. */ - if (!window->user_win && !window->tx_win) { + if (!window->pnv.user_win && !window->pnv.tx_win) { WARN_ON_ONCE(vinst->rxwin[window->cop]); vinst->rxwin[window->cop] = window; } @@ -668,11 +672,11 @@ static void set_vinst_win(struct vas_instance *vinst, static void clear_vinst_win(struct vas_window *window) { int id = window->winid; - struct vas_instance *vinst = window->vinst; + struct vas_instance *vinst = window->pnv.vinst; mutex_lock(&vinst->mutex); - if (!window->user_win && !window->tx_win) { + if (!window->pnv.user_win && !window->pnv.tx_win) { WARN_ON_ONCE(!vinst->rxwin[window->cop]); vinst->rxwin[window->cop] = NULL; } @@ -687,6 +691,8 @@ static void init_winctx_for_rxwin(struct vas_window *rxwin, struct vas_rx_win_attr *rxattr, struct vas_winctx *winctx) { + struct vas_instance *vinst; + /* * We first zero (memset()) all fields and only set non-zero fields. * Following fields are 0/false but maybe deserve a comment: @@ -751,8 +757,9 @@ static void init_winctx_for_rxwin(struct vas_window *rxwin, winctx->min_scope = VAS_SCOPE_LOCAL; winctx->max_scope = VAS_SCOPE_VECTORED_GROUP; - if (rxwin->vinst->virq) - winctx->irq_port = rxwin->vinst->irq_port; + vinst = rxwin->pnv.vinst; + if (vinst->virq) + winctx->irq_port = vinst->irq_port; } static bool rx_win_args_valid(enum vas_cop_type cop, @@ -875,9 +882,9 @@ struct vas_window *vas_rx_win_open(int vasid, enum vas_cop_type cop, return rxwin; } - rxwin->tx_win = false; - rxwin->nx_win = rxattr->nx_win; - rxwin->user_win = rxattr->user_win; + rxwin->pnv.tx_win = false; + rxwin->pnv.nx_win = rxattr->nx_win; + rxwin->pnv.user_win = rxattr->user_win; rxwin->cop = cop; rxwin->wcreds_max = rxattr->wcreds_max; @@ -911,6 +918,8 @@ static void init_winctx_for_txwin(struct vas_window *txwin, struct vas_tx_win_attr *txattr, struct vas_winctx *winctx) { + struct vas_instance *vinst = txwin->pnv.vinst; + /* * We first zero all fields and only set non-zero ones. Following * are some fields set to 0/false for the stated reason: @@ -931,7 +940,7 @@ static void init_winctx_for_txwin(struct vas_window *txwin, winctx->wcreds_max = txwin->wcreds_max; winctx->user_win = txattr->user_win; - winctx->nx_win = txwin->rxwin->nx_win; + winctx->nx_win = txwin->pnv.rxwin->pnv.nx_win; winctx->pin_win = txattr->pin_win; winctx->rej_no_credit = txattr->rej_no_credit; winctx->rsvd_txbuf_enable = txattr->rsvd_txbuf_enable; @@ -948,23 +957,23 @@ static void init_winctx_for_txwin(struct vas_window *txwin, winctx->lpid = txattr->lpid; winctx->pidr = txattr->pidr; - winctx->rx_win_id = txwin->rxwin->winid; + winctx->rx_win_id = txwin->pnv.rxwin->winid; /* * IRQ and fault window setup is successful. Set fault window * for the send window so that ready to handle faults. */ - if (txwin->vinst->virq) - winctx->fault_win_id = txwin->vinst->fault_win->winid; + if (vinst->virq) + winctx->fault_win_id = vinst->fault_win->winid; winctx->dma_type = VAS_DMA_TYPE_INJECT; winctx->tc_mode = txattr->tc_mode; winctx->min_scope = VAS_SCOPE_LOCAL; winctx->max_scope = VAS_SCOPE_VECTORED_GROUP; - if (txwin->vinst->virq) - winctx->irq_port = txwin->vinst->irq_port; + if (vinst->virq) + winctx->irq_port = vinst->irq_port; winctx->pswid = txattr->pswid ? txattr->pswid : - encode_pswid(txwin->vinst->vas_id, txwin->winid); + encode_pswid(vinst->vas_id, txwin->winid); } static bool tx_win_args_valid(enum vas_cop_type cop, @@ -1032,10 +1041,10 @@ struct vas_window *vas_tx_win_open(int vasid, enum vas_cop_type cop, } txwin->cop = cop; - txwin->tx_win = 1; - txwin->rxwin = rxwin; - txwin->nx_win = txwin->rxwin->nx_win; - txwin->user_win = attr->user_win; + txwin->pnv.tx_win = 1; + txwin->pnv.rxwin = rxwin; + txwin->pnv.nx_win = txwin->pnv.rxwin->pnv.nx_win; + txwin->pnv.user_win = attr->user_win; txwin->wcreds_max = attr->wcreds_max ?: VAS_WCREDS_DEFAULT; init_winctx_for_txwin(txwin, attr, &winctx); @@ -1050,10 +1059,10 @@ struct vas_window *vas_tx_win_open(int vasid, enum vas_cop_type cop, * NOTE: If kernel ever resubmits a user CRB after handling a page * fault, we will need to map this into kernel as well. */ - if (!txwin->user_win) { - txwin->paste_kaddr = map_paste_region(txwin); - if (IS_ERR(txwin->paste_kaddr)) { - rc = PTR_ERR(txwin->paste_kaddr); + if (!txwin->pnv.user_win) { + txwin->pnv.paste_kaddr = map_paste_region(txwin); + if (IS_ERR(txwin->pnv.paste_kaddr)) { + rc = PTR_ERR(txwin->pnv.paste_kaddr); goto free_window; } } else { @@ -1105,9 +1114,9 @@ int vas_paste_crb(struct vas_window *txwin, int offset, bool re) * report-enable flag is set for NX windows. Ensure software * complies too. */ - WARN_ON_ONCE(txwin->nx_win && !re); + WARN_ON_ONCE(txwin->pnv.nx_win && !re); - addr = txwin->paste_kaddr; + addr = txwin->pnv.paste_kaddr; if (re) { /* * Set the REPORT_ENABLE bit (equivalent to writing @@ -1154,7 +1163,7 @@ static void poll_window_credits(struct vas_window *window) int count = 0; val = read_hvwc_reg(window, VREG(WINCTL)); - if (window->tx_win) + if (window->pnv.tx_win) mode = GET_FIELD(VAS_WINCTL_TX_WCRED_MODE, val); else mode = GET_FIELD(VAS_WINCTL_RX_WCRED_MODE, val); @@ -1162,7 +1171,7 @@ static void poll_window_credits(struct vas_window *window) if (!mode) return; retry: - if (window->tx_win) { + if (window->pnv.tx_win) { val = read_hvwc_reg(window, VREG(TX_WCRED)); creds = GET_FIELD(VAS_TX_WCRED, val); } else { @@ -1278,7 +1287,7 @@ int vas_win_close(struct vas_window *window) if (!window) return 0; - if (!window->tx_win && atomic_read(&window->num_txwins) != 0) { + if (!window->pnv.tx_win && atomic_read(&window->pnv.num_txwins) != 0) { pr_devel("Attempting to close an active Rx window!\n"); WARN_ON_ONCE(1); return -EBUSY; @@ -1297,11 +1306,11 @@ int vas_win_close(struct vas_window *window) poll_window_castout(window); /* if send window, drop reference to matching receive window */ - if (window->tx_win) { - if (window->user_win) + if (window->pnv.tx_win) { + if (window->pnv.user_win) vas_drop_reference_task(&window->task); - put_rx_win(window->rxwin); + put_rx_win(window->pnv.rxwin); } vas_window_free(window); @@ -1385,12 +1394,12 @@ struct vas_window *vas_pswid_to_window(struct vas_instance *vinst, * since their CRBs are ignored (not queued on FIFO or processed * by NX). */ - if (!window->tx_win || !window->user_win || !window->nx_win || - window->cop == VAS_COP_TYPE_FAULT || - window->cop == VAS_COP_TYPE_FTW) { + if (!window->pnv.tx_win || !window->pnv.user_win || + !window->pnv.nx_win || window->cop == VAS_COP_TYPE_FAULT || + window->cop == VAS_COP_TYPE_FTW) { pr_err("PSWID decode: id %d, tx %d, user %d, nx %d, cop %d\n", - winid, window->tx_win, window->user_win, - window->nx_win, window->cop); + winid, window->pnv.tx_win, window->pnv.user_win, + window->pnv.nx_win, window->cop); WARN_ON(1); } diff --git a/arch/powerpc/platforms/powernv/vas.h b/arch/powerpc/platforms/powernv/vas.h index f7aa2d04cd16..72ccb2f692cc 100644 --- a/arch/powerpc/platforms/powernv/vas.h +++ b/arch/powerpc/platforms/powernv/vas.h @@ -345,34 +345,6 @@ struct vas_instance { struct dentry *dbgdir; }; -/* - * In-kernel state a VAS window. One per window. - */ -struct vas_window { - /* Fields common to send and receive windows */ - struct vas_instance *vinst; - int winid; - bool tx_win; /* True if send window */ - bool nx_win; /* True if NX window */ - bool user_win; /* True if user space window */ - void *hvwc_map; /* HV window context */ - void *uwc_map; /* OS/User window context */ - int wcreds_max; /* Window credits */ - - struct vas_win_task task; - char *dbgname; - struct dentry *dbgdir; - - /* Fields applicable only to send windows */ - void *paste_kaddr; - char *paste_addr_name; - struct vas_window *rxwin; - - /* Feilds applicable only to receive windows */ - enum vas_cop_type cop; - atomic_t num_txwins; -}; - /* * Container for the hardware state of a window. One per-window. * @@ -449,8 +421,8 @@ static inline void vas_log_write(struct vas_window *win, char *name, { if (val) pr_debug("%swin #%d: %s reg %p, val 0x%016llx\n", - win->tx_win ? "Tx" : "Rx", win->winid, name, - regptr, val); + win->pnv.tx_win ? "Tx" : "Rx", win->winid, + name, regptr, val); } static inline void write_uwc_reg(struct vas_window *win, char *name, @@ -458,7 +430,7 @@ static inline void write_uwc_reg(struct vas_window *win, char *name, { void *regptr; - regptr = win->uwc_map + reg; + regptr = win->pnv.uwc_map + reg; vas_log_write(win, name, regptr, val); out_be64(regptr, val); @@ -469,7 +441,7 @@ static inline void write_hvwc_reg(struct vas_window *win, char *name, { void *regptr; - regptr = win->hvwc_map + reg; + regptr = win->pnv.hvwc_map + reg; vas_log_write(win, name, regptr, val); out_be64(regptr, val); @@ -478,7 +450,7 @@ static inline void write_hvwc_reg(struct vas_window *win, char *name, static inline u64 read_hvwc_reg(struct vas_window *win, char *name __maybe_unused, s32 reg) { - return in_be64(win->hvwc_map+reg); + return in_be64(win->pnv.hvwc_map + reg); } /* -- 2.18.2
This patch series enables VAS / NX-GZIP on powerVM which allows the user space to do copy/paste with the same existing interface that is available on powerNV. VAS Enablement: - Get all VAS capabilities using H_QUERY_VAS_CAPABILITIES that are available in the hypervisor. These capabilities tells OS which type of features (credit types such as Default and Quality of Service (QoS)). Also gives specific capabilities for each credit type: Maximum window credits, Maximum LPAR credits, Target credits in that parition (varies from max LPAR credits based DLPAR operation), whether supports user mode COPY/PASTE and etc. - Register LPAR VAS operations such as open window. get paste address and close window with the current VAS user space API. - Open window operation - Use H_ALLOCATE_VAS_WINDOW HCALL to open window and H_MODIFY_VAS_WINDOW HCALL to setup the window with LPAR PID and etc. - mmap to paste address returned in H_ALLOCATE_VAS_WINDOW HCALL - To close window, H_DEALLOCATE_VAS_WINDOW HCALL is used to close in the hypervisor. NX Enablement: - Get NX capabilities from the the hypervisor which provides Maximum buffer length in a single GZIP request, recommended minimum compression / decompression lengths. - Register to VAS to enable user space VAS API Main feature differences with powerNV implementation: - Each VAS window will be configured with a number of credits which means that many requests can be issues simultaniously on that window. On powerNV, 1K credits are configured per window. Whereas on powerVM, the hypervisor allows 1 credit per window at present. - The hypervisor introduced 2 different types of credits: Default - Uses normal priority FIFO and Quality of Service (QoS) - Uses high priority FIFO. On powerVM, VAS/NX HW resources are shared across LPARs. The total number of credits available on a system depends on cores configured. We may see more credits are assigned across the system than the NX HW resources can handle. So to avoid NX HW contention, pHyp introduced QoS credits which can be configured by system administration with HMC API. Then the total number of available default credits on LPAR varies based on QoS credits configured. - On powerNV, windows are allocated on a specific VAS instance and the user space can select VAS instance with the open window ioctl. Since VAS instances can be shared across partitions on powerVM, the hypervisor manages window allocations on different VAS instances. So H_ALLOCATE_VAS_WINDOW allows to select by domain indentifiers (H_HOME_NODE_ASSOCIATIVITY values by cpu). By default the hypervisor selects VAS instance closer to CPU resources that the parition uses. So vas_id in ioctl interface is ignored on powerVM except vas_id=-1 which is used to allocate window based on CPU that the process is executing. This option is needed for process affinity to NUMA node. The existing applications that linked with libnxz should work as long as the job request length is restricted to req_max_processed_len. Tested the following patches on P10 successfully with test cases given: https://github.com/libnxz/power-gzip Note: The hypervisor supports user mode NX from p10 onwards. Linux supports user mode VAS/NX on P10 only with radix page tables. Patches 1- 4: Move the code that is needed for both powerNV and powerVM to powerpc book3s platform directory Patch5: Modify vas-window struct to support both and the related changes. Patch 6: Define HCALL and the related VAS/NXGZIP specific structs. Patch 7: Define QoS credit flag in window open ioctl Patch 8: Implement Allocate, Modify and Deallocate HCALLs Patch 9: Retrieve VAS capabilities from the hypervisor Patch 10; Implement window operations and integrate with API Patch 11: Setup IRQ and NX fault handling Patch 12; Add sysfs interface to expose VAS capabilities Patch 13 - 14: Make the code common to add NX-GZIP enablement Patch 15: Get NX capabilities from the hypervisor patch 16; Add sysfs interface to expose NX capabilities Changes in V2: - Rebase on 5.12-rc6 - Moved VAS Kconfig changes to arch/powerpc/platform as suggested by Christophe Leroy - build fix with allyesconfig (reported by kernel test build) Changes in V3: - Rebase on 5.12-rc7 - Moved vas-api.c and VAS Kconfig changes to arch/powerpc/platform/book3s as Michael Ellerman suggested Haren Myneni (16): powerpc/powernv/vas: Rename register/unregister functions powerpc/vas: Make VAS API powerpc platform independent powerpc/vas: Create take/drop task reference functions powerpc/vas: Move update_csb/dump_crb to common book3s platform powerpc/vas: Define and use common vas_window struct powerpc/pseries/vas: Define VAS/NXGZIP HCALLs and structs powerpc/vas: Define QoS credit flag to allocate window powerpc/pseries/VAS: Implement allocate/modify/deallocate HCALLS powerpc/pseries/vas: Implement to get all capabilities powerpc/pseries/vas: Integrate API with open/close windows powerpc/pseries/vas: Setup IRQ and fault handling powerpc/pseries/vas: sysfs interface to export capabilities crypto/nx: Rename nx-842-pseries file name to nx-common-pseries crypto/nx: Register and unregister VAS interface crypto/nx: Get NX capabilities for GZIP coprocessor type crypto/nx: Add sysfs interface to export NX capabilities arch/powerpc/include/asm/hvcall.h | 7 + arch/powerpc/include/asm/vas.h | 122 +++- arch/powerpc/include/uapi/asm/vas-api.h | 6 +- arch/powerpc/platforms/Kconfig | 1 + arch/powerpc/platforms/Makefile | 1 + arch/powerpc/platforms/book3s/Kconfig | 15 + arch/powerpc/platforms/book3s/Makefile | 2 + arch/powerpc/platforms/book3s/vas-api.c | 485 +++++++++++++ arch/powerpc/platforms/powernv/Kconfig | 14 - arch/powerpc/platforms/powernv/Makefile | 2 +- arch/powerpc/platforms/powernv/vas-api.c | 278 -------- arch/powerpc/platforms/powernv/vas-debug.c | 12 +- arch/powerpc/platforms/powernv/vas-fault.c | 155 +--- arch/powerpc/platforms/powernv/vas-trace.h | 6 +- arch/powerpc/platforms/powernv/vas-window.c | 250 ++++--- arch/powerpc/platforms/powernv/vas.h | 42 +- arch/powerpc/platforms/pseries/Makefile | 1 + arch/powerpc/platforms/pseries/vas-sysfs.c | 173 +++++ arch/powerpc/platforms/pseries/vas.c | 674 ++++++++++++++++++ arch/powerpc/platforms/pseries/vas.h | 98 +++ drivers/crypto/nx/Kconfig | 1 + drivers/crypto/nx/Makefile | 2 +- drivers/crypto/nx/nx-common-powernv.c | 6 +- .../{nx-842-pseries.c => nx-common-pseries.c} | 135 ++++ 24 files changed, 1889 insertions(+), 599 deletions(-) create mode 100644 arch/powerpc/platforms/book3s/Kconfig create mode 100644 arch/powerpc/platforms/book3s/Makefile create mode 100644 arch/powerpc/platforms/book3s/vas-api.c delete mode 100644 arch/powerpc/platforms/powernv/vas-api.c create mode 100644 arch/powerpc/platforms/pseries/vas-sysfs.c create mode 100644 arch/powerpc/platforms/pseries/vas.c create mode 100644 arch/powerpc/platforms/pseries/vas.h rename drivers/crypto/nx/{nx-842-pseries.c => nx-common-pseries.c} (90%)